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Page 1: NBR Arktite Interlocked Receptacles with Enclosed Circuit ...€¦ · NBR Arktite® Interlocked Receptacles with Enclosed Circuit Breakers APJ/NPJ Arktite Plugs NEMA 3, 3R, 4*, 4X*,

3P

1379www.crouse-hinds.com US: 1-866-764-5454 CAN: 1-800-265-0502 Copyright© 2013 Eaton’s Crouse-Hinds Business

NBR Arktite® InterlockedReceptacles with Enclosed Circuit BreakersAPJ/NPJ Arktite Plugs

NEMA 3, 3R, 4*, 4X*, 12WatertightCorrosion-Resistant

Applications:NBR Arktite interlocked receptacles withenclosed circuit breakers are used:• To supply power and provide short

circuit protection, thermal overloadprotection, and a disconnect means forportable electrical equipment such asmotor generator sets, compressors,conveyors, and other similar equipment

• In locations where corrosion is presentsuch as in offshore and marinelocations, pulp and paper mills, chemicalplants, food processing, and sewagetreatment plants

• Indoors and outdoors in damp, wet orhosedown locations

Features:• Enclosures are made of Krydon® high

impact strength fiberglass-reinforcedpolyester material having excellentresistance to corrosion and heat

• Receptacles are mechanicallyinterlocked with circuit breakers whichprovide a disconnect means, shortcircuit protection, and thermal time delayoverload protection

• For maximum safety, the spring doorreceptacle at the bottom is mechanicallyinterlocked with the circuit breakeroperating mechanism. The circuitbreaker cannot be closed until the plugis fully inserted and the plug cannot bewithdrawn unless the breaker is open

• Enclosure has hinged access door foreasy wiring and maintenance. Threescrews, hidden behind access door indoor frame, prevent disassembly whendoor is locked

• Enclosure access door is mechanicallyinterlocked with operating handle andcannot be opened unless operatinghandle operator is in "OFF" position

• A Krydon material hub (not mounted) issupplied with each enclosure as follows:

Rating Hub Size (In.) Cat. #

30A 3/4 NHUB260A 11/4 NHUB4100A 2 NHUB6

For alternate hub sizes, see page 677• Receptacle has self-closing spring door

assembly to provide environmentalprotection

• Operating handle can be padlocked in"OFF" position. Breaker is trip-free ofhandle and will open under short circuitor overload when handle is in the "ON"position

• Provided with top and bottom mountingfeet which may be rotated 90° to verticalor horizontal mounting positions

Interchangeability of PlugsWith Other Non-hazardousand Hazardous LocationReceptacles:• Plugs listed for use with NBR

assemblies are standard ArktiteAPJ/NPJ plugs. Other standardAPJ/NPJ and CPH plugs of the samerating, style and number of poles maybe used with NBR receptacles, as wellas EBBR, EPC and EPCB receptacleslisted in Section 4P

• Portable equipment, suitable for thelocations and equipped with the properplug, can be used with non-hazardousrated AR receptacles, DBR and WSRinterlocked receptacles located in non-hazardous locations, with EBBR, EPCand EPCB receptacles for Class I,Groups B, C, D hazardous locations,with DR and DBR interlockedreceptacles for Class II, Groups F, Ghazardous locations, and with NBR/NSRinterlocked receptacles for wet andcorrosive locations

Standard Materials:• Enclosure, covers and operating handles

– Krydon fiberglass-reinforced polyestermaterial

• Operating shafts – stainless steel• Receptacle housings – copper-free

aluminum• Receptacle insulators – Krydon material• Crimp/solder contacts – leaded red

brass

Standard Finishes:• Copper-free aluminum – baked on

powder epoxy• Stainless steel – natural• Enclosure – natural• Receptacle insulators – natural (red)• Brass – natural• Leaded red brass – electro-tin-plated

Certifications andCompliances:• NEMA 3, 3R, 4*, 4X*, 12• ANSI/UL Standard: 489• UL Standard: 1682• CSA

Electrical Rating Range:• Receptacles – 30, 60 and 100 amperes• Circuit Breakers – 100 ampere frame

size

Note: For additional dimensional data, see page 510, enclosure catalog numberNCB1024.

Options:Description Suffix

Special polarity – for use where twoor more receptacles of the sameampere rating, style and number ofpoles are to be installed on thesame premises for use of differentvoltages. Receptacle interior rotated221/2° to right (viewed from face) andplug changed to match ..................... S4Hubs for other conduit sizes can besupplied. See page 677.

*30 and 60A Style 2 only.

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Page 2: NBR Arktite Interlocked Receptacles with Enclosed Circuit ...€¦ · NBR Arktite® Interlocked Receptacles with Enclosed Circuit Breakers APJ/NPJ Arktite Plugs NEMA 3, 3R, 4*, 4X*,

1380 www.crouse-hinds.com US: 1-866-764-5454 CAN: 1-800-265-0502 Copyright© 2013 Eaton’s Crouse-Hinds Business

3P

3P NBR Arktite® InterlockedReceptacles with EnclosedCircuit BreakersAPJ/NPJ Arktite Plugs▲

3-Pole, 600 VACNEMA 3, 3R, 4, 4X, 12WatertightCorrosion-Resistant

100 Ampere Frame Size with Non-interchangeable Trip‡§Enclosure

Receptacle

With Spring

Door Housing

Hub

Size

(In.)

Ckt.

Brkr.

Amps

Without

Circuit

Breaker Cat. #

With

Cutler-Hammer Circuit

Breaker Cat. #

Style 1†

30 amp.,3-wire,3-pole

3/4

20

NBR53731

NBR53731 WT20 330 NBR53731 WT30 340 NBR53731 WT40 3*50 NBR53731 WT50 3*

60 amp.,3-wire,3-pole

11/4

50

NBR56731

NBR56731 WT50 360 NBR56731 WT60 370 NBR56731 WT70 3*90 NBR56731 WT90 3*100 NBR56731 WT100 3*

100 amp.,3-wire,3-pole

2

60

NBR51731

NBR51731 WT60 370 NBR51731 WT70 390 NBR51731 WT90 3100 NBR51731 WT100 3

Style 2†

30 amp.,3-wire,4-pole

3/4

20

NBR53742

NBR53742 WT20 330 NBR53742 WT30 340 NBR53742 WT40 3*50 NBR53742 WT50 3*

60 amp.,3-wire,4-pole

11/4

50

NBR56742

NBR56742 WT50 360 NBR56742 WT60 370 NBR56742 WT70 3*90 NBR56742 WT90 3*100 NBR56742 WT100 3*

100 amp.,3-wire,4-pole

2

60

NBR51742

NBR51742 WT60 370 NBR51742 WT70 390 NBR51742 WT90 3100 NBR51742 WT100 3

*Circuit breaker trip rating may exceed receptacle rating for welding equipment applications only, as higher trip rating maynot protect wiring.†Style 1 – Grounded through shell. Style 2 – Grounded through extra pole and shell. For a detailed description of thesegrounding methods, see page 1314.§Also available with interchangeable trip breakers. Specify on order.‡ For detailed information on circuit breaker selection, see Section 3C.

APJ/NPJ Plugs600 VACWith Cable Grip and NeopreneBushing

APJ

NPJ

Amps

Cable

O.D.

Range

Style 1†

3-wire,

3-pole

Cat. #

Style 2†

3-wire,

4-pole

Cat. #

30

0.60 to 1.20 APJ3375 APJ3485

0.55 to 0.70 NPJ3483

0.70 to 0.85 NPJ3484

60

0.75 to 1.45 APJ6375 APJ6485

0.75 to 1.07 NPJ6484

1.07 to 1.35 NPJ6485

100

1.00 to 1.70 APJ10377 APJ10487

0.93 to 1.21 NPJ10486

1.21 to 1.50 NPJ10487Dimensions (In Inches):

APJ NPJ

Amps b a aa

30 313/8 413/16 760 33 513/16 613/16

100 333/4 65/8 73/4

Dim. "a" and "aa" are exposed portion of plug whenengaged with receptacle.

▲ Pressure connectors are standard. Crimp/solder type terminators are optionally available for 3 and 4-pole 30, 60 and 100 ampere. For details, see page 1316. To specify, add the suffix "T" to the catalog number. For example: APJ3375-T (Plug).

Page 3: NBR Arktite Interlocked Receptacles with Enclosed Circuit ...€¦ · NBR Arktite® Interlocked Receptacles with Enclosed Circuit Breakers APJ/NPJ Arktite Plugs NEMA 3, 3R, 4*, 4X*,

1381www.crouse-hinds.com US: 1-866-764-5454 CAN: 1-800-265-0502 Copyright© 2013 Eaton’s Crouse-Hinds Business

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NSR Arktite® InterlockedReceptacles With EnclosedDisconnect SwitchesAPJ/NPJ Arktite Plugs

NEMA 3, 3R, 4*, 4X*, 12WatertightCorrosion-Resistant

Applications:NSR Arktite interlocked receptacles withenclosed disconnect switches are used:• To provide a power disconnect for fixed

or portable electrical equipment such aswelders, generators and compressorswhere the switch will be subject tofrequent operation

• To provide short circuit protection whena fusible switch is needed

• In non-hazardous indoor or outdoorareas where corrosion, dust, hosedownand moisture may be a problem such asin offshore and marine locations, pulpand paper mills, chemical plants,sewage treatment plants and foodprocessing facilities

Features:• Enclosures are made of Krydon® high

impact strength fiberglass-reinforcedpolyester material having excellentresistance to corrosion and heat

• Switches are NEMA type HD heavy duty3-pole, enclosed blade; a quick make-and-break mechanism with reinforced,positive pressure type blade and jawconstruction. Fusible switches have fuseclips with steel reinforcing springs

• For maximum safety, the spring doorreceptacle at the bottom is mechanicallyinterlocked with the switch operatingmechanism. The switch cannot beclosed until the plug is fully inserted andthe plug cannot be withdrawn unless theswitch is open

• Switch enclosure access door ismechanically interlocked with switch andcannot be opened unless switchoperator is in "OFF" position

• Enclosure has hinged access door foreasy wiring and maintenance. Threescrews, located behind access door indoor frame, prevent disassembly whendoor is locked

• A Krydon material hub (not mounted) issupplied with each enclosure as follows:

Rating Hub Size (In.) Cat. #

30A 3/4 NHUB260A 11/4 NHUB4100A 2 NHUB6

For alternate hub sizes, see page 677• Receptacle has self-closing spring door

assembly to provide environmentalprotection

• Mounting feet may be rotated 90° tohorizontal or vertical mounting positions

• Switch operating handle may bepadlocked in the "OFF" position,preventing unauthorized operation of theswitch

Interchangeability of PlugsWith Other Non-hazardousand Hazardous LocationReceptacles:• Plugs listed for use with NSR assemblies

are standard Arktite APJ/NPJ plugs.

Other standard APJ/NPJ and CPH plugsof the same rating, style and number ofpoles may be used with NSRreceptacles, as well as with EBBR, EPC and EPCB receptacles listed inSection 4P

• Portable equipment, suitable for thelocations and equipped with the properplug, can be used with non-hazardousrated AR receptacles, DBR and WSRinterlocked receptacles located in non-hazardous locations, with EBBR, EPCand EPCB receptacles for Class I,Groups B, C, D hazardous locations,with DR and DBR interlockedreceptacles for Class II, Groups F, Ghazardous locations, and with NBR/NSRinterlocked receptacles for wet andcorrosive locations

Standard Materials:• Receptacle housings – copper-free

aluminum• Insulators (plug and receptacle) – Krydon

material• Crimp/solder contacts – leaded red

brass• Enclosure and operating handle –

Krydon fiberglass-reinforced polyestermaterial

• Other exterior parts – stainless steel

Standard Finishes:• Copper-free aluminum – baked-on

powder epoxy• Stainless steel – natural• Leaded red brass – electro-tin-plated• Enclosure – natural (gray)• Insulator (plug and receptacle) – natural

(red)

Options:Description Suffix

Special polarity – for use where twoor more receptacles for the sameampere rating, style and number ofpoles are to be installed in the samearea for use on different voltages.Receptacle interior rotated 221/2° toright (viewed from face) andmatching plug ................................... S4

Hubs for other conduit sizes can besupplied. See page 677.

Certifications andCompliances:• NEMA 3, 3R, 4*, 4X*, 12• UL Standard: 1682, 98

*30 and 60A Style 2 only.

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1380-1381.qxp 12/17/2013 5:54 PM Page 1381

Page 4: NBR Arktite Interlocked Receptacles with Enclosed Circuit ...€¦ · NBR Arktite® Interlocked Receptacles with Enclosed Circuit Breakers APJ/NPJ Arktite Plugs NEMA 3, 3R, 4*, 4X*,

3P

1382 www.crouse-hinds.com US: 1-866-764-5454 CAN: 1-800-265-0502 Copyright© 2013 Eaton’s Crouse-Hinds Business

NSR Arktite® InterlockedReceptacles With EnclosedDisconnect SwitchesAPJ/NPJ Arktite Plugs††

240 and 600 VAC250 VDCNEMA 3, 3R, 4, 4X, 12WatertightCorrosion-Resistant

240VAC/250VDC 600VAC/250VDC

Amps

Conduit

Opening

Sizes§

Style 1†

3-wire,

3-pole

Cat. #

Style 2†

3-wire,

4-pole

Cat. #

AC

HP

Rating

DC

HP

Rating

Style 1†

3-wire,

3-pole

Cat. #

Style 2†

3-wire,

4-pole

Cat. #

AC

HP

Rating

DC

HP

Rating

Fusible

30 3/4 NSR331‡ NSR332‡ 3 5 NSR3351* NSR3352* 71/2 560 11/4 NSR631‡ NSR632‡ 5 10 NSR6351* NSR6352* 20 10100 2 NSR1031‡ NSR1032‡ 10 20 NSR10351* NSR10352* 30 20

Non-Fusible

30 3/4 NSR3341 NSR3342 71/2 5 NSR33541 NSR33542 20 560 11/4 NSR6341 NSR6342 20 10 NSR63541 NSR63542 50 10100 2 NSR10341 NSR10342 30 20 NSR103541 NSR103542 75 20

*Arranged for NEC Class H fuses. May be field converted to NEC Class J fuses.‡Fuse clips accommodate NEC Class H fuses. For NEC Class J fuses, use 600V switches.†Style 1 – Grounded through shell. Style 2 – Grounded through extra pole and shell. For adetailed description of these grounding methods, see page 1314.§For alternate hub sizes, refer to catalog page 856.

APJ/NPJ Plugs600VAC/250VDC, with Cable Grip and NeopreneBushing

Amps

Cable

O.D. Range

Style 1†

3-wire, 3-pole Cat. #

Style 2†

3-wire, 4-pole Cat. #

300.60 to 1.20 APJ3375 APJ34850.55 to 0.70 NPJ34830.70 to 0.85 NPJ3484

600.75 to 1.45 APJ6375 APJ64850.75 to 1.07 NPJ64841.07 to 1.35 NPJ6485

1001.00 to 1.70 APJ10377 APJ104870.93 to 1.21 NPJ104861.21 to 1.50 NPJ10487

DimensionsIn Inches:

APJ NPJ

Amps b a aa

30 313/8 413/16 760 33 513/16 613/16

100 333/4 65/8 73/4

Dim. "a" and "aa" are exposed portion of plug whenengaged with receptacle.

††Pressure connectors are supplied as standard. To specify crimp/solder type terminatorsadd the suffix "T" to the catalog number. For example: APJ3375-T (Plug).

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1382-1383.qxp 12/17/2013 5:44 PM Page 1382


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